Failed loading filenames with +

[if-gh]

https://github.com/awslabs/aws-lambda-redshift-loader/blob/master/index.js#L785-L790

This line is replacing all + with (whitespace) which is problematic for filenames with +, e.g.:
Original filename in S3: hello+world.csv
Generated manifest: hello world.csv
Then Redshift will complain the key does not exist when trying to load the manifest.
I manually changed it to:

url: 's3://' + batchEntries[i],

and it worked fine for me.